.main {
  width: 100%;
}
.main .course {
  display: flex;
  width: 1200px;
  height: 278px;
  border-bottom: 1px solid #e4e7eb;
}
.main .course .item-oc {
  text-align: center;
  width: 300px;
  height: 278px;
  padding-top: 60px;
}
.main .course .item-oc img {
  width: 120px;
  height: 120px;
}
.main .course .item-oc h3 {
  font-size: 24px;
  font-weight: 400;
  margin-top: 30px;
  letter-spacing: 0px;
  line-height: 28.13px;
  color: #333333;
}
.main .course .item-oc.active {
  border-bottom: 4px solid #1842b6;
}
.main .teachlist {
  width: 1200px;
  margin-top: 20px;
}
.main .teachlist .item-teach {
  display: none;
  width: 1200px;
  height: 1300px;
}
.main .teachlist .item-teach.active {
  display: block;
}
.main .teachlist .item-teach li {
  display: flex;
  margin-bottom: 20px;
  width: 1200px;
  height: 244px;
  border-radius: 20px;
  background: #f7f9fa;
}
.main .teachlist .item-teach li .li-left {
  width: 164px;
  height: 164px;
  border-radius: 50%;
  padding: 40px 50px 40px 50px;
}
.main .teachlist .item-teach li .li-right {
  width: 886px;
}
.main .teachlist .item-teach li .li-right span {
  display: flex;
  margin-top: 40px;
  font-size: 22px;
  font-weight: 400;
  letter-spacing: 0px;
  line-height: 25.78px;
  color: #333333;
  text-align: left;
}
.main .teachlist .item-teach li .li-right span h4 {
  padding-left: 20px;
  font-size: 16px;
  font-weight: 400;
  letter-spacing: 0px;
  line-height: 25.78px;
  color: #666666;
}
.main .teachlist .item-teach li .li-right p {
  height: 96px;
  margin-top: 20px;
  font-size: 16px;
  font-weight: 400;
  letter-spacing: 0px;
  line-height: 24px;
  color: #333333;
}
